Description

Eccosorb® SF-U

THIN, FLEXIBLE, RESONANT ABSORBER

Eccosorb SF-U is a narrow banded, magnetically loaded resonant absorber sheet for free- space applications. These polyurethane rubber sheets are designed to be bonded to flat or curved metallic surfaces to reduce the reflectivity in a narrow band of frequencies. Eccosorb SF-U reflects -20 dB or less of normally incident microwave energy at the design frequency in the range of 1 to 26 GHz.

Specific product Characteristics

Features&Benefits
High mechanical strength easeof bonding excellent abrasion resistance Silicone-free
Markets
Commercial Telecom Security and Defense Automotive
Typical application
Lining radar nacelles and the exterior of airframes particularly where high power is present. Lining of cavity backed and shrouded telecommunication antennas where narrowband performance is required. Lining metal surfaces of vehicles to reduce overall radar signature. Attaching to masts of ships,walls,etc to reduce reflection sand echoes from nearby antennas. Lining magnetron housings to prevent detuning. Fabricating into tapered shapes for impedance matchingin waveguide or microstrip applications. Lining metal surfaces to attenuate surface currents, suppressing reflections inside microwave modules, and dampening cavity resonances in microwave modules. Formodule interference, cavity resonance and surface current problems, ECCOSORB® GDS-U, ECCOSORB® MCS-U and ECCOSORB® BSR-U are recommended due to their high magnetic loss properties, broadband performance, as well as the availability of a wider range of thicknesses (0.010” to 0.100”)
Availability
Standard sheets are 305 x 30 5mm (12”x12”) Thickness varies depending on resonant frequency desired. Other resonant frequencies can be supplied on special order. The material can also be supplied in customized shapes. It can be supplied with a pressure sensitive adhesive (PSA).
Istructions for use
Eccosorb SF-U is designed to function directly in front of a metallic surface. If this is not the case, a metallic foil should first be bonded to the object. To obtain a strong bond of the absorber to the object, the metallic surface should first be thoroughly cleaned with a degreasing solvent. To obtain a strong bond of the absorber to the object, clean the surface with a degreasing solvent, apply a thin coat of primer to the dried surface and apply a RTV silicone adhesive. Eccosorb SF-U can be readily cut with a sharp knife and template. It is a very flexible material and will conform to mild curvatures.

Product properties

Properties	ECCOSORB SF-U
Max service temperature °C (°F)	120 (325)
Hardness (Shore A)	80
Surface Density Range	3 to 21.5
Density Range g/cm³	2.6 – 4.7
Tensile Strength MPa	2.–5.5
Elongation at break %	60–225
Tear Strength N/mm	3.0 to 15

Data for design engineer guidance only. Observed performance varies in application.
Engineers are reminded to test the material in application.

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Euro Technologies offers a wide selection of products. Inside the general catalogue are described, each range, including its features and benefits, specifications, the available variants and possible applications.

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